Nut and bolt lock.



H. HERMAN.

NUT AND BOLT LOCK.

APPLICATION FILED JULY 19.1913.

Patented Mar. 30, 1915.

INVENTOR WITNESSES.

6o? LA KL inv rr sirarns Parana HARRY HERMAN, F PITTSBURGH,PENNSYLVANIA, ASSIGNOR 0F ONE-.HAL-F TO JACOB HERMAN, 0F PITTSBURGH,PENNSYLVANIA.

NUT AND BOLT LOCK.

masses.

' Specification of Letters Patent.

Patented Mar. 36, 1915.

p Application filed Ju1yi9,1 913. Serial No. 780,058.

ToaZZ whom it may concern:

. Be itknown that I, HARRY HERMAN, a

citizen of the United States of America, re-

siding at Pittsburg in the county of Allegheny and Stateof Pennsylvania,have invented new and useful Improvements in Nut and Bolt Locks, ofwhich the following is a full, clear, and exact description, referencebeing had to the accompanying drawings, which form part of thisspecification.

This invention relates to means whereby a nut may be positively lockedto its bolt or vice versa, the general object being. to provide animproved construction which shall be simple, strong and durable inconstruc:.

tion and easy to lock and unlock. V

A further object of my invention is to providea lock of the abovecharacter, which does not require special machine work in the makingthereof but in which parts of the locking elements of the nut and boltmay be formed in the making of the nut and bolt themselves.

Another object of my invention is to pro vide an individual lock nut, orin other words, a lock which will permit of locking of the nut to thebolt or similar threaded structure independently of an under nut orother object or sub-structure, as well as with such nut. I will nowdescribe my invention, in'connection with the accompanying drawings, sothat others skilled in the art to which it appertains may understand andconstruct the same, it being premised, however, that changes will occurto those skilled in the art, which would not be departures from myinvention as set forth in the appended claims. Figure l is alongitudinal sectional view of a nut lock embodying my invention, aportion of the bolt being in elevation, and showing the locking devicein position pre paratory to locking thereof against displacement; Fig. 2is a similar view but showing the nut and bolt locked together and thelocking device in locking position; Fig. 3 is a top plan view of a nutand bolt showing the said members as having complementary recesses forthe reception of the locking member; Fig. 4 is a top plan View of Fig. 2and showing the application of a tool for removing the locking device;Fig. 5 is a perspective view of the locking device; Fig. 6 is a bottomplan view of a nut showing formation of a recess for the reception ofthe locking device; Fig. 7 is a perspective view showing a bar or stripof stock from which the nut may be punched; and Fig. 8 1s a sectionalview showing a base or support for holding the nut during punchingthereof, all views to be hereinafter more fully described.

Referring to the drawings, there is shown a nut 2 of the usual hexagonalshape, but, of course, it will be understood that the invention is notlimited to the particular shape of a nut or a particular kind of bolt,as my invention finds ready adaptation to the general or commercial formof nuts and bolts.

The usual threaded opening of the nut has a notch or recess 3 and thebolt 4, has formed in the threaded shank thereof, a complementarylongitudinal groove or recess 5, while extending across the bottom faceof the nut, and preferably in registry or alinement with the groove orrecess 3 is another recess 6. 7

To look the nut to the bolt I provide a locking member 7. After the nutis applied to the bolt and the recesses 3 and 5 have been broughtopposite one another so as to form a key-way between the nut and thebolt, the finger or shank 8 of the locking device is inserted in saidkeyway, in the manner shown in Fig. 1. This brings an opposite angularlydisposed terminal '9 of the locking device into position for receptionthereof by the recess 6, after which the said terminal 9 or end of thelocking device 7 is driven into the recess 6, as shown in Fig. 2.Driving of the portion 9 into the recess 6, looks the member 7 inposition so that the shank 8 is prevented from accidental withdrawal.The depth and location of the recess or groove 6 are such that theportion 9 of the locking member may lie wholly therewithin, the end ofsaid member being thus substantially in- .closed and consequentlyprotected against such as a tool 10, as shown in Fig. 4, may be insertedbetween the body of the locking device and the adjacent wrench face ofthe nut, for the purpose of Withdrawing the end 9 from the recess 6,thus permitting ready Withdrawal of the shank 8 from the pocket formedby the recesses 3 and 5. The nut or bolt may then be reset or removed asdesired.

I In order to facilitate removal of the mem ber 7 by means of a wedgingtool, it is best to so proportion the locking member, that whenthe end9 thereof has been driven into the groove or recess 6, there is leftbetween the bent-over portion of member 7 and the adjacent lateral orwrench face of the nut a space into which such tool may be readilyinserted, this arrangement being most clearly shown in Fig. 2 of thedrawings.

It will be seen that my invention presents a structure which does notrequire special machine work. formed in the bolt blank in the making ofthe bolt and, as shown in Fig. 7, the recess 6 may be rolled orotherwise formed in the'bar or strip of stock 11 from which the nut maybe punched or made. In the punching of the nut to form' the usual boltopening thereof the recess 3 may be simultaneously formed, as by havinga projecting portion 12, (see Fig. 8) formed on the die12 which makesthe bolt opening.

In Fig. 8 I also show a die 'base or support 13 having a bead orprojecting rib 14 which fits into the recess 60f the nut or blank andserves to prevent flattening of the recessed bottom of the nut in thepunching of the bar or strip 11 and of, the bolt hole therein.

The groove 5 may be The locking member 7 may be formed from any suitablesh-ape'of stock and =ordi nary wire may be ,used for this purpose. Saidlocking member may be provided with a protective coating, and an extraoperation to provide this coating, in this particular de vice, may beobviated by employing the usual galvanizedwire or rod.

The advantages =of,.-my invention will be appreciated by those skilledin the art .since I' am enabled to provide a lock that is notonly cheapto manufacture butv in which an I absolute'or positive lock effect isobtained.

Furthermore, "the device may be readily unlocked for the purpose ofremovingthe nu or for resetting or tightening it;

Having thus described my invention,

what I claim and desire to secure 'byLetters v Patent is:

A device of the character described, comsaid bolt being provided with alongitudinal:

groove at least as long as said nut, and a locking device having a shankportion for insertion in said longitudinal groove and a projectionarranged for insertion in said transverse groove.

In testimony whereof I have; hereunto set' my handy g V V HARRY HERMAN.

WVitnesses:

M. A. KELL R, E. I. EARTH. 7.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

' Washington, DIG.

groove extending

